tarmac

Concise Oxford English Dictionary © 2008 Oxford University Press:
tarmac/ˈtɑːmak/

▶noun (trademark in the UK) material used for surfacing roads or other outdoor areas, consisting of broken stone mixed with tar.

■ a runway or other area surfaced with such material.

▶verb (tarmacs, tarmacking, tarmacked) surface with tarmac.

– origin early 20th cent.: abbrev. of tarmacadam.